Another Shark "Virgin Birth" Confirmed
نویسنده
چکیده
In May 2007, the 5-foot, 94-pound shark died of stress-related complications related to her unknown pregnancy after undergoing a yearly checkup. The 10-inch shark pup was found during a necropsy of Tidbit, surprising aquarium officials. They initially thought the embryonic pup was either a product of a virgin birth or a cross between the blacktip and a male of another shark species which has never been documented, Chapman said.
منابع مشابه
Scientists: Second case of 'virgin birth' in a shark
In May 2007, the 5-foot, 94-pound shark died of stress-related complications related to her unknown pregnancy after undergoing a yearly checkup. The 10-inch shark pup was found during a necropsy of Tidbit, surprising aquarium officials. They initially thought the embryonic pup was either a product of a virgin birth or a cross between the blacktip and a male of another shark species which has ne...
متن کاملShark virgin birth produces multiple, viable offspring.
Facultative automictic parthenogenesis has only recently been confirmed in the most ancient jawed vertebrates, the chondrichthyan fishes (sharks, batoids, and chimeras). To date, however, in both documented cases, the females have only produced a single parthenogen offspring, and none of these have lived for more than 3 days. We present a genetically verified case of automictic parthenogenesis ...
متن کاملVirgin birth in a hammerhead shark.
Parthenogenesis has been documented in all major jawed vertebrate lineages except mammals and cartilaginous fishes (class Chondrichthyes: sharks, batoids and chimeras). Reports of captive female sharks giving birth despite being held in the extended absence of males have generally been ascribed to prior matings coupled with long-term sperm storage by the females. Here, we provide the first gene...
متن کاملThe Rationale and Significance of the Virgin Birth
The scope of this paper is the rationale and significance of the virgin birth, not the historical evidence for it. But in fact the rationale and significance are as important for the defence of the virgin birth as is the historical evidence. One of the main charges against it has been that it is theologically superfluous, dubious or even heretical. On the other hand, defenders of the virgin bir...
متن کاملInsights into the life history and ecology of a large shortfin mako shark Isurus oxyrinchus captured in southern California.
In June 2013, a record-breaking female Isurus oxyrinchus (total length 373 cm, mass 600 kg) was captured by rod and reel off Huntington Beach, California, where it was subsequently donated to research and provided a rare opportunity to collect the first data for a female I. oxyrinchus of this size. Counts of vertebral band pairs estimate the shark to have been c. 22 years old, depending upon as...
متن کامل